<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
    />
    <meta
      name="description"
      content="Use localFrameToFixedFrameGenerator for adequate rotation."
    />
    <meta name="cesium-sandcastle-labels" content="Tutorials" />
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script
      type="text/javascript"
      src="../../../Build/CesiumUnminified/Cesium.js"
      nomodule
    ></script>
    <script type="module" src="../load-cesium-es6.js"></script>
  </head>
  <body
    class="sandcastle-loading"
    data-sandcastle-bucket="bucket-requirejs.html"
  >
    <style>
      @import url(../templates/bucket.css);
    </style>
    <div id="cesiumContainer" class="fullSize"></div>
    <div id="loadingOverlay">
      <h1>Loading...</h1>
    </div>
    <div id="toolbar">
      <table class="infoPanel">
        <tbody>
          <tr>
            <td>
              Click on the 3D window then use the keyboard to change settings.
            </td>
          </tr>
          <tr>
            <td>Heading: <span id="heading"></span>°</td>
          </tr>
          <tr>
            <td>← to left/→ to right</td>
          </tr>
          <tr>
            <td>Pitch: <span id="pitch"></span>°</td>
          </tr>
          <tr>
            <td>↑ to up/↓ to down</td>
          </tr>
          <tr>
            <td>roll: <span id="roll"></span>°</td>
          </tr>
          <tr>
            <td>← + ⇧ left/→ + ⇧ right</td>
          </tr>
        </tbody>
      </table>
    </div>
    <script id="cesium_sandcastle_script">
      window.startup = async function (Cesium) {
        "use strict";
        //Sandcastle_Begin
        const viewer = new Cesium.Viewer("cesiumContainer");
        const canvas = viewer.canvas;
        canvas.setAttribute("tabindex", "0"); // needed to put focus on the canvas
        canvas.addEventListener("click", function () {
          canvas.focus();
        });
        canvas.focus();

        const scene = viewer.scene;
        const camera = viewer.camera;
        const controller = scene.screenSpaceCameraController;
        let r = 0;

        const hpRoll = new Cesium.HeadingPitchRoll();
        const hpRange = new Cesium.HeadingPitchRange();
        const deltaRadians = Cesium.Math.toRadians(1.0);

        const localFrames = [
          {
            pos: Cesium.Cartesian3.fromDegrees(-123.075, 44.045, 5000.0),
            converter: Cesium.Transforms.eastNorthUpToFixedFrame,
            comments: "Classical East North Up\nlocal Frame",
          },
          {
            pos: Cesium.Cartesian3.fromDegrees(-123.075, 44.05, 5500.0),
            converter: Cesium.Transforms.localFrameToFixedFrameGenerator(
              "north",
              "west"
            ),
            comments: "North West Up\nlocal Frame",
          },
          {
            pos: Cesium.Cartesian3.fromDegrees(-123.075, 44.04, 4500.0),
            converter: Cesium.Transforms.localFrameToFixedFrameGenerator(
              "south",
              "up"
            ),
            comments: "South Up West\nlocal Frame",
          },
          {
            pos: Cesium.Cartesian3.fromDegrees(-123.075, 44.05, 4500.0),
            converter: Cesium.Transforms.localFrameToFixedFrameGenerator(
              "up",
              "east"
            ),
            comments: "Up East North\nlocal Frame",
          },
          {
            pos: Cesium.Cartesian3.fromDegrees(-123.075, 44.04, 5500.0),
            converter: Cesium.Transforms.localFrameToFixedFrameGenerator(
              "down",
              "east"
            ),
            comments: "Down East South\nlocal Frame",
          },
        ];

        const primitives = [];
        const hprRollZero = new Cesium.HeadingPitchRoll();

        for (let i = 0; i < localFrames.length; i++) {
          const position = localFrames[i].pos;
          const converter = localFrames[i].converter;
          const comments = localFrames[i].comments;
          try {
            const planePrimitive = scene.primitives.add(
              await Cesium.Model.fromGltfAsync({
                url: "../../SampleData/models/CesiumAir/Cesium_Air.glb",
                modelMatrix: Cesium.Transforms.headingPitchRollToFixedFrame(
                  position,
                  hpRoll,
                  Cesium.Ellipsoid.WGS84,
                  converter
                ),
                minimumPixelSize: 128,
              })
            );

            primitives.push({
              primitive: planePrimitive,
              converter: converter,
              position: position,
            });
          } catch (error) {
            console.log(`Error loading model: ${error}`);
          }
          const modelMatrix = Cesium.Transforms.headingPitchRollToFixedFrame(
            position,
            hprRollZero,
            Cesium.Ellipsoid.WGS84,
            converter
          );
          scene.primitives.add(
            new Cesium.DebugModelMatrixPrimitive({
              modelMatrix: modelMatrix,
              length: 300.0,
              width: 10.0,
            })
          );

          const positionLabel = position.clone();
          positionLabel.z = position.z + 300.0;
          viewer.entities.add({
            position: positionLabel,
            label: {
              text: comments,
              font: "18px Helvetica",
              fillColor: Cesium.Color.WHITE,
              outlineColor: Cesium.Color.BLACK,
              outlineWidth: 2,
              style: Cesium.LabelStyle.FILL_AND_OUTLINE,
              verticalOrigin: Cesium.VerticalOrigin.CENTER,
              HorizontalOrigin: Cesium.HorizontalOrigin.RIGHT,
            },
          });
        }

        primitives[0].primitive.readyEvent.addEventListener((model) => {
          // Zoom to first model
          r = 2.0 * Math.max(model.boundingSphere.radius, camera.frustum.near);
          controller.minimumZoomDistance = r * 0.5;
          const center = model.boundingSphere.center;
          const heading = Cesium.Math.toRadians(90.0);
          const pitch = Cesium.Math.toRadians(0.0);
          hpRange.heading = heading;
          hpRange.pitch = pitch;
          hpRange.range = r * 100.0;
          camera.lookAt(center, hpRange);
        });

        document.addEventListener("keydown", function (e) {
          switch (e.code) {
            case "ArrowDown":
              // pitch down
              hpRoll.pitch -= deltaRadians;
              if (hpRoll.pitch < -Cesium.Math.TWO_PI) {
                hpRoll.pitch += Cesium.Math.TWO_PI;
              }
              break;
            case "ArrowUp":
              // pitch up
              hpRoll.pitch += deltaRadians;
              if (hpRoll.pitch > Cesium.Math.TWO_PI) {
                hpRoll.pitch -= Cesium.Math.TWO_PI;
              }
              break;
            case "ArrowRight":
              if (e.shiftKey) {
                // roll right
                hpRoll.roll += deltaRadians;
                if (hpRoll.roll > Cesium.Math.TWO_PI) {
                  hpRoll.roll -= Cesium.Math.TWO_PI;
                }
              } else {
                // turn right
                hpRoll.heading += deltaRadians;
                if (hpRoll.heading > Cesium.Math.TWO_PI) {
                  hpRoll.heading -= Cesium.Math.TWO_PI;
                }
              }
              break;
            case "ArrowLeft":
              if (e.shiftKey) {
                // roll left until
                hpRoll.roll -= deltaRadians;
                if (hpRoll.roll < 0.0) {
                  hpRoll.roll += Cesium.Math.TWO_PI;
                }
              } else {
                // turn left
                hpRoll.heading -= deltaRadians;
                if (hpRoll.heading < 0.0) {
                  hpRoll.heading += Cesium.Math.TWO_PI;
                }
              }
              break;
            default:
          }
        });

        const headingSpan = document.getElementById("heading");
        const pitchSpan = document.getElementById("pitch");
        const rollSpan = document.getElementById("roll");

        viewer.scene.preUpdate.addEventListener(function (scene, time) {
          for (let i = 0; i < primitives.length; i++) {
            const primitive = primitives[i].primitive;
            const converter = primitives[i].converter;
            const position = primitives[i].position;
            Cesium.Transforms.headingPitchRollToFixedFrame(
              position,
              hpRoll,
              Cesium.Ellipsoid.WGS84,
              converter,
              primitive.modelMatrix
            );
          }
        });

        viewer.scene.preRender.addEventListener(function (scene, time) {
          headingSpan.innerHTML = Cesium.Math.toDegrees(hpRoll.heading).toFixed(
            1
          );
          pitchSpan.innerHTML = Cesium.Math.toDegrees(hpRoll.pitch).toFixed(1);
          rollSpan.innerHTML = Cesium.Math.toDegrees(hpRoll.roll).toFixed(1);
        });
        //Sandcastle_End
      };
      if (typeof Cesium !== "undefined") {
        window.startupCalled = true;
        window.startup(Cesium).catch((error) => {
          "use strict";
          console.error(error);
        });
        Sandcastle.finishedLoading();
      }
    </script>
  </body>
</html>
